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Finding the Fourth Proportional to 40,865, 61,312.26 and 20,103.08

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Solution

The fourth proportional to 40,865, 61,312.26 and 20,103.08 is: 30,161.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,865 : 61,312.26 = 20,103.08 : x
  2. Step 2: Convert to fraction form
    40,865/61,312.26 = 20,103.08/x
  3. Step 3: Cross multiply
    40,865x = 61,312.26 × 20,103.08
  4. Step 4: Simplify right side
    40,865x = 1,232,565,267.76
  5. Step 5: Solve for x
    x = 1,232,565,267.76/40,865
  6. Step 6: Final answer
    x = 30,161.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.